Enzyme Internal Error: unknown node with tag 12

[kkwiatkowski]

Current behavior

React in version 16.3 introduces new Context API. That API comes with two new node types (12 and 13).
These node types are not supported and therefore enzyme-adapter-react-16 is throwing an error:

# for ContextConsumer
Enzyme Internal Error: unknown node with tag 12

or

# for ContextProvider
Enzyme Internal Error: unknown node with tag 13

when you use Context API inside your React components.

An example:

import React from 'react';
import { mount } from 'enzyme';

const { Provider, Consumer } = React.createContext();
const Component = () => (
  <Provider value="test">
    <Consumer>{value => <span>{value}</span>}</Consumer>
  </Provider>
);

mount(<Component />); // this will thrown an error mentioned earlier

Expected behavior

New node types are handled correctly.

API

• shallow
• mount
• render

Version

library	version
Enzyme	^3.3.0
React	^16.3.0

Adapter

• enzyme-adapter-react-16

[ghost]

@kkwiatkowski this is a duplicate of #1509, which has already been fixed by #1513. Just waiting on a release by enzyme 😢

[kkwiatkowski]

@baldwmic thanks for your answer. For some reason I couldn't find anything around it.

[KaiHotz]

Did this fix get released yet?
I still have this problem on Enzyme v3.3.0 with enzyme-adapter-react-16 v 1.1.1

[ljharb]

No, not yet. Please be patient.

[dzearing]

Sorry to ping here, but any ETA on the release? This is blocking a lot of people, I'd suspect. Basically we aren't able to move to the new context without breaking existing enzyme tests.

[ljharb]

No ETA just yet. I understand the frustration and that it's blocking many people, including Airbnb, from using many of React 16's new features.

It will be released as soon as it's ready.

[nhunzaker]

@ljharb just chiming in to say thanks for taking the time to do it right. Enzyme is an amazing library!

[msluther]

@ljharb Is there an issue we can follow that isn't closed to check on the progress of a fix here getting published?

[ljharb]

@msluther #1553

[msluther]

@ljharb Thank you! 😄

[ljharb]

The following packages are now released:

• enzyme v3.4.0
• enzyme-adapter-react-16 v1.2.0
• enzyme-adapter-react-16.3 v1.0.0
• enzyme-adapter-react-16.2 v1.0.0
• enzyme-adapter-react-16.1 v1.0.0
• enzyme-adapter-react-15 v1.0.6
• enzyme-adapter-react-15.4 v1.0.6
• enzyme-adapter-react-14 v1.0.6
• enzyme-adapter-react-13 v1.0.4
• enzyme-adapter-utils v1.5.0

[Fl4v10]

I got this problem with "enzyme": "^3.9.0"

[ljharb]

@Fl4v10 please file a new issue